Hi, while trying to update clustalo package for Debian , compiling v1.2.3 failed with the following error while compiling hhalign.lo
.... hhalignment-C.h:2571:43: error: call of overloaded 'log2(float)' is ambiguous hhalignment-C.h:2572:43: error: call of overloaded 'log2(float)' is ambiguous .... It seems a cast to double or float is necessary for your log2 calls. As I do not know what is the type of your data, I did not try any conversion. for code like q.tr[i][I2I]=log2(q.tr[i][I2I]/sum); It may be related to gcc (v6) version or related libraries. Thanks Olivier -- Olivier Sallou IRISA / University of Rennes 1 Campus de Beaulieu, 35000 RENNES - FRANCE Tel: 02.99.84.71.95 gpg key id: 4096R/326D8438 (keyring.debian.org) Key fingerprint = 5FB4 6F83 D3B9 5204 6335 D26D 78DC 68DB 326D 8438

